Liquid-feeding device for rock drills



Dec. 10, 1929. c, c, HANSEN 1,739,141

LiQUID FEEDING DEVICE FOR ROCK DRILLS Filed Sept. 18. 1928 N N N INVENTORE 67mm 6 01101252712. BY 4 Q1;

Hi5 ATTORNEY- Federated Dec, 1 1929 CHARLES C. HANSEN, GE EASTOH, PENNSYLVAEKKA, ASSIGNQR Till THGEF-fiSLL-EAND GQMPANY, F JERSEY CITY, hlEW JERSEY, A GQ'BPQRATEQN 9F i l b LIQUID-FEEDING DEVICE FOR BRUCE Application filed September 18, 1928. Serial T50.

This invention relates to rock drills, but more particularly to a fluid feeding device for iluid actuated rock drills of the hammer type.

The objects of the invention are to eliminate the chances of leakage of pressurefiuid from the rock drill through the Working implement into the drill hole, to assure an abundant supply of cleansing liquid to the drill hole and, to assure against the leakage 10 of cleansing liquid into the percussive element of the rock drill.

Other objects will be in part obvious and 'in part pointed out hereinafter.

Tn the drawings illustrating the invention is and in which similar reference characters refer to similar parts Figure l a longitudinal sectional view of the front end of a rock drill equipped with a fluid feeding device constructed in accordance with the practice of the invention;

Figure 2 is a transverse view taken through Figure 1 on the line 2-2 looking in the direction indicated by the arrows, and

Figure 3 is a longitudinal side elevation of the fluid feeding device.

Referring to the drawings, A denotes a front head in which is disposed chuck mechanism comprising a chuck B and a chuck 'aw G which may be interlocked with the chuc B an in a well known manner. A chuck bushing D is disposed in the'chuck B to receive slidably the shank E of a working implement F, such as a drill steel.

The drill steel F in this instance is provided with a single lug G to interlock with a rib H in the chuck jaw C for transmitting the rotation of the chuck mechanism to the drill steel. The rearward end or shank E of the drill steel F in this instance is of the solid 59 the rock drill with a water tube. Such water tube usually extends entirely through the drill and with its front end into the working implement. Tn'such case of course the working implement or drill steel 1 is hollow throughout its length. while this method E has proved satisfactory in most respects there are instances however, in which it is objectionable owing to an injector edect created by this mode of introducing cleansing liquid into the drill steel and whereby air is drawn into the drill hole. Moreover, anypressure fluid leaking past or through the percussive element of the drill may readily flow through the drill steel into the drill hole from whence it issues in the form of bubbles carrying with it dry cuttings or dust which circulates in the vicinity of the drilling operation and is inhaled b the operator, frequently to the detriment 0 his health.

The present invention contemplates the preclusion of pressure fluid .or air bubbles from the drill hole and consequently the presence of dust in the vicinity of the drilling operation. To this end the front head A is pro vided with an extension L at its front end. as The extension L may he in transverse section I of semi-circular form and has a recess 0 for the reception of a flexible sleeve P which may be of rubber or other suitable flexible material. The flexible sleeve P has a recess Q, which forms a chamber for water around the drill steel F and adjacent the passage K, the recess Q being of such length that the passage K will at all times be in communication therewith. ln order to assure against leakage of water from the recess Q the sleeve P is provided at its ends withintegral flanges R having bores S through which the drill steel eztends. The bores S are preferably of sli htly' smaller diameter than the diameter 0 the drill steel so that the flanges may tightly engage the drill steel to form fluid tight joints therebetween.

In order to enable the lug G of the drill steel F to readily pass through the sleeve 1? said sleeve is longitudinally split as at T to allow the sleeve to be opened. The sleeve P is provided oil-opposite sides of the cut or s lit T with lateral extensions or wings U which, when the steel is closed, will lie in face to face Q the sleeve P in the operative position.

erly vided with slots Z for the reception of a bolt 6 having a nut (2 whereby the plates and thus also the wings U may be firmly clamped together. Preferably the Wings U are secured to the plates X and to this end rivets e are employed for fastening the wings U to the plates so that when the plates X are opened the wings U will open therewith,

I Additional means may be used for securing In the present instance the sleeve P and the extension L are provided with aligned bores f. and g respectively for the reception of a connection h which has a flange j at its innermost end-t0 lie against the wall of the recess Q. The outer portion of the connection his threaded to receive a nut is whereby the said connection may be clamped securely to the extension L.

The connection h is provided witha passage 0 through which water from a suitable source of supply may be introduced into the recess Q. Preferably a port 12' is formed in the front end of the front head A between the chuck jaw C and the extension L to provide an escape for any pressure fluid which may find its we to the front end of the drill.

The mo e of operation of the device is as follows: Whenever it'is desired to insert a drill steel F in the front head A. the plates :X maybe opened to permit the passage of the lug G therethrough into the chuck mechanism. After the drill steel F has been pro'pinserted the plates X and the sleeve l? may be closed and firmly clamped together by means of the bolt 6 and the nut d. The device extension on the drill steel extends and having an open side will then be in readiness for supplying water to the drill steel and an effective seal may be obtained against leakage of water from the chamber. v

I claim: I

1. In a fluid actuated rock drill, the combination of a front head and a. drill steel having a passage, a lug on the drill steel, an the front head through which to permit the passage of the lug through the extension, means secured to the-extension to form a closure therefor, and a flexible sleeve in the extension forming a chamber for cleansin liquid around the drill steel adjacent the inlet opening of the passage and hav= ing, integral flanges at its ends in fluid tight engagement with the drill steel, and means secured to the extension for conveying cleansing liquid into the sleeve.

2, In a fluid actuated rock drill, the corn bination of a front head and a drill steel having a passage, a lu on the drill steel, an extension integral wit the front head through which the drill steel extends and having an open side to permit the passage of the lug through the extension, means pivotally secured tothe extension to form a closure for the open side, a flexible sleeve in the extension forming a chamber for cleansing liquid adjacent the inlet openin of the passage and having flanges in fluid tig t engagement with the drill steel, said sleeve being longitudinally split to enable said sleeve to open with the said means, and a connection secured to the extension for clamping the sleeve to the extension and for conveying cleansing liquid into the sleeve.

3. In a fluid actuated rock drill, the combination of a front head and a drill steel having aipassage,a lug on the drill steel, an extension. integral with the front head through which thedrill steel extends and having an open side to permit the passage of the lug through the extension, a plate pivotally secured to the extension to form a closure for cleansing liquid adjacent the inlet opening of the passage and ,having'end flanges in fluid tight engagement with the drill steel to prevent leakage of liquid from the chamber, said sleeve being longitudinally split to enable said sleeve to be opened to permit the passage of the lug therethrough, "wings on the. sleeve adapted to be held in fluid tight relationship by the plate, and a connection secured to the extension for conveying cleansin liquid into the sleeve.

In a fluid actuated rock drill, the combination of a front head and a drill steel having a passage, a lug on the drill steel, an extension integral with the front head through which the drill steel extends and having an open side to permit the passage of the lug through the extension, a pair of plates secure pivotally to the extension to form a closure for the open side, a flexible sleeve in the extension and the plates forming a chamber around the drill steel for cleansing liquid adjacent the inlet opening of the passage and having integral flanges at its ends in iluid tight'engagement with the drill steel to prevent leakage of water from the chamber, said sleeve being longitudinally split and having Wings extending between the plates, means for securing the wings to the plates to assure openin of the sleeve with the plates, means for he ding the plates securely in closed position and for holding the wings in fluid tight relationship, and a connection secured to the extension for conveying cleansing liquid into the sleeve.

In testimony whereof I have signed this specification. 7

'onaatas o. nausea. 

